The product is designed for electric shock protection and human indirect contact protection,and electric equipment protection when human body touching electricity or electric network leak current exceeds stipulated value,in household or similar uses with AC 50Hz,rated working voltage 400V and below,rated current up to 63A,without relationship to line voltage.It is widely used in all kinds of fields,such as industry,business,civilian household,and so on.It can be used for overload and short-circuit protections when it cooperates with the CDB17 series breakers.